Owen t



(No Model.)

0. T. B'UGG.

GOTTON GIN.

No. 333,387; Patented Dec. 29, 1885.

(9 II}V%TOR.

ATTURN'EY NITED STATES PAT NT OFFICE.

OWVEN T. BUGG, OF NEWARK, NEW JERSEY.

COTTON-GIN.

SPECIFICATION forming part of Letters Patent No. 333,387, dated December29, 1885.

Application filed August 31, 1885. Serial No. 175,794. (No model.)

To 61% whom it may concern:

Be it known that I, OWEN T. BUGG, of Newark, in the county of Essex andState of New Jersey, have invented certain new and useful Improvementsin Cotton-Grins; and I do hereby-declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it pertains to make and use it,reference being bad to the accompanying drawings,which form part of thisspecification.

My invention relates to an improvement in cotton-gins; and it consistsin a hollow cylinder for cotton-gins, having its teeth formed as anintegral part of its surface, and provided with sharp points and beveledsides and ends, and having grooves running spirally and longitudinally,as will be more fully described hereinafter.

The object of .my invention is to provide a hollow cylinder which hasthe ginning-teeth formed as an integral part of its surface, for thepurpose of dispensing with the use of saws and ribs, which haveheretofore been employed, to produce a larger number of teeth upon agiven surface, to produce a lighter cylinder, and to greatly reduce thecost of the construction of the gin.

Figure 1 is a vertical section of a cotton-gin embodying my invention.Figs. 2 and 3 are enlarged detail views of the cylinder.

No claim is here made to any special construction of the gin itself, formy cylinder may be used in any connection or in any position for thepurpose of ginning cotton.

In making my cylinder I take a metallic tube of the desired size and cutany suitable number of longitudinal grooves A, which are out upon aslant, so that the points of the teeth B will be sufficiently sharp tocatch hold of the cotton or any fibrous material which is brought incontact with the cylinder. These grooves A are separated but a veryslight distance from each other, and will be given an amount of slant orunder-cut in proportion to the size of the teeth desired and thesharpness of points of the teeth that may be preferred. After thecylinder has been grooved longitudinally, as shown, a triangular-shapedgroove, I, is cut into and around the cylinder, the slant or bevel ofthe sides being such that the outer edges of the teeth are quite sharp.The outer edges of the teeth form the greatest diameter of the cylinder,and are in a perfect circle. The points of the teeth are sufficientlysharp to catch and retain any fibrous substance that may come in contactwith them when the cylinder is revolving forward; but the rear ends ofthe teeth are cut away at such an angle that they present no surfacewhatever upon which the cotton or other material can catch. When thecylinder is revolving forward, it will catch all of the fibrous materialwhich comes in contact with the teeth; but if the cylinder is revolvedbackward it will not catch the material in any manner. It will be seenthat the teeth are cut from the solid surface of the cylinder and forman integral part thereof, in contradistinction to teeth which are eitherformed in rings by means of saws or in any detached manner, and then puttogether for the purpose of forming a cylinder. Owing to the extremelysmall size of the teeth, a very large number are placed in acomparatively small surface, and thus the ginning capacity of thecylinder is greatly increased over that of ordinary saws, or where theteeth are formed separately from the cylinder.

For the purpose of setting the teeth slightly out of line with eachother, the groove which extends circumferentially around the cylinder isout upon a spiral, or at any suitable angle that may be preferred, andthus the teeth are not placed in regular rows, so as to act only uponcertain portions of the cotton that-is being ginned. The teeth beingplaced out of line with each other, act equally upon every portion ofthe cotton, and thus the cotton is ginned equally at all points alike.By forming the teeth directly upon the surface of the cylinder, as hereshown, a hollow cylinder is formed, which greatly lessens the weight ofthe gin over the cylinders formed by saws or formed of solid bodies andto which the teeth are applied. This construction also greatly cheapensthe cost of a gin, because the cylinder is nothing more than a tube ofthe required diameter, which is put in a suitable lathe and finishedentirely by machinery, thus requiring no hand-work and no skilled laborin putting a number of parts together. Suitable bearings are placed ineach end of this hollow cylinder, the cylinder is placed in the gin inthe manner shown, and when made to revolve every one of the manythousand teeth upon the cylinder begins to operate upon the cotton atall points alike. There being no ribs in the gin and the teeth beingformed on every portion of the cylinder alike, it will be seen that avery greatly-increased amount of work can be done in a given time with acylinder constructed as here shown and described as compared to acylinder which is formed of a series of saws or of teeth which areseparated from each other. The teeth upon the cylinder also being verysmall, a much less power is required to operate the gin as compared witha cylinder formed of saws or large teeth which catch deeply in thecotton.

Having thus described my invention, I claim- A hollow cylinder forcotton-gins, having 20 its teeth formed as an integral part of itssurface, and provided with sharp points and beveled sides and ends, andhaving grooves running spirally and longitudinally, substantially asshown. 2 5

In testimony whereofI affix my signature in presence of two witnesses.

OWEN T. BUGG.

Witnesses:

F. A. LEHMANN, J NO. E. PROSPERI.

